An error rate improvement of decision feedback equalization by extraordinary level detection

Decision feedback equalization, which uses extraordinary level detection (Ex-DFE), with two feedback loops in parallel, is a detection technique which achieves not only significant error rate improvements but also detecting performance of burst-errors. As extraordinary level detection does not use any constraint on channel codes, Ex-DFE is effective for both runlength limited codes with minimum runlength parameters d=0 and d=1. The simple implementation, which contains no high-accuracy A/D convertor or Viterbi detector, is suggested.